<!DOCTYPE html>
<html lang="zh-CN">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Vue Reactivity 示例</title>
	</head>
	<body>
		<div id="app"></div>

		<button class="btn">加1</button>

		<!-- 引入 Vue Reactivity 库 -->
		<script src="https://unpkg.com/@vue/reactivity@3.0.5/dist/reactivity.global.js"></script>
		<!-- <script src="7.1.js"></script> -->
		<script src="7-2.js"></script>
	</body>
</html>
